Explanation
According to the PMBOK Guide 7th Edition, one of the principles of project management is to optimize stakeholder value. This means that the project manager should understand and balance the needs and expectations of the stakeholders, and deliver solutions that create value for them. To optimize stakeholder value, the project manager should put all of the requirements, priorities, and progress on a visible board, share it with all entities, and decrease the number of meetings. This will help to communicate the project information clearly and transparently, to align the stakeholder expectations and feedback, and to reduce the waste and inefficiency caused by excessive meetings. Asking the project sponsor to attend the meetings, informing the stakeholders about a daily meeting, or stopping attending meetings are not the best actions, as they do not address the root cause of the problem, which is the lack of effective and efficient communication and collaboration among the project team and the end users. References: PMBOK Guide 7th Edition, page
12-13.